Pump for pumping water, oil, or other liquids from wells and the like



Dec. 19, 1944. 1 J, L E FEVRE 2,365,281

1 PUMP FOR PUMPING WATER, OIL, OR OTHER LIQUIDs FROM WELLS AND THE LIKE Filed Feb. 9, 1944 2 Sheets-Sheet 1 L. J.' Le F'evz invento Lf Attorney Dec. 19, 1944. J, LE FEVRE 2,365,281

PUMP'FOR PUMPING WATER, OIL, 0R OTHER LIQUIDs FROM WELLS AND THE LIKE Filed Feb. 9, 1944 2 Sheets-Sheet 2 l... J. Le F'evre IWWTTOT Patented Dec. 19, 1944 A )UNITED g PATENT *OFFICE PUMP Fon PUMPIN G WATER, on.,l on* OTHER L IQUms FROM WELLS AND THE mK u I Leopold Julius Le Fevre. Point Piper. New South I Wales, Australia Application February 9, 1944, Serial No. 521,600

In'AustraliaMarch 2, 1943y 9 clams., (criss-zoe) 4This invention relates more particularly to the type of' pump that is driven by a windmill. Hitherto in this class of pump the applied power on the suction stroke hadnot only to be; suiiivv cient to raise' the water in the suction and dis-v charge pipe but also to lift the vertical pump rod. lIt is known that prior attempts to comu pensate for the weight of the water in the delivery pipe and the pump rod, or either, have been made but the means employed are entirely different to those adopted for carrying the presrod and eliminate the weight of the water withf in the delivery pipe the percentage of compense,- tion varying according to the weight of the pump rod and the head of water in the delivery pipe. By this means applied mechanical `power'required to drive the pump will be considerably reduced because each suction stroke isassisted by pressure of the head of water in the `delivery pipe, the additional power thus obtained compensating for the weight of the vertical rod on each suction stroke of the pump and'on the down or delivery stroke of the pump the weight of the pump rod assists to overco-. e the pressure of the head of water against the internal surface of the auxiliary cylinder.

Ingcarrying the invention into effect a fixed cylinder (which may .be called the pump cylinder) and a sleeve piston slidable.. thereon and may .be calledthe another iixed cylinder (which auxiliary cylinder) and a' coacting sleeve piston slidable thereon are arranged in axial alignment withone another and within separate xed air cylinders the upper portion of eachof which form air chambers. All of these cylindersand line A- A of Fig; 1, and looking in the directiony the coacting sleeve pistons are arranged concen-y trically within thev space being provided between the Vinner wall of the delivery pipe andthe air cylinders. The Sleeve pistons are eachY provided with oppositely positioned pins or trunnionsy/hich project radially through slots formed in the respective, xed air Acylinders to enable them to be con-- by a yoke positioned within they nected together annular space and connected, to a vertical pump rod that is power driven.

Theair chambers are by which they are open to atmosphere through pipes provided for that purpose. :y

Any known means are lprovided for the indelivery pipe, an annular i,

provided with apertures sertion of packing'or packing rings between the inner surfaces of Iboth the sleeve pistons andy the respective outer surfaces of the fixed pump and auxiliary cylinders and also between the vouter surfaces of the sleeve pistons and their respective airfcylinders. The 'fixed lpump cylinder is provided with suction and delivery apertures and appropriate valves.

A feature of this invention isvthat the closed end of bothv the pump and auxiliary sleeve pistons vare each provided with a valve the seatings for which are formed on opposite sides of a plate` which ymaybe screwed 'into' apertures formed centrally in the closed end of each sleeve piston.-

The upper or exterior valvemay be a ball or other valve the lower one lying within the re-l spective sleeve pistons and being a metal or other float valve, both the interior and exterior valves Ibeing respectively enclosed in suitable cages. By this ymeans air can be expelled from the sleeve pistons so longv as Water therein has not risen to a height suiiicient to cause the retheir seatings, but pistons from the respective spective valves to oat onto air cannot enter the air chambers.

The invention will however be clearly understood from, the detailed description 'which will now be given and wherein reference will be made to the accompanying drawings in which- Fig. 1 is a sectional elevation showing a delivery `pipe wherein is a pum-p constructed and arranged according to this invention 'but sec-v tions have ybeen removed in order to conserve space. I

Fig. 2 vis a sectionaly elevation the section be ing takenat right angles to that shown in Fig. 1. Fig. 3 is adiagrammatic sectional elevation on asmaller scale showing the general arrangement of the parts of this invention.

Fig. 4 is a `transverse sectional view taken on the indicated by the arrows.r

Fig. 5 is a transverse the ,line B-B ofA Fig. 1 and looking tion indicated lby theV arrows. l

Fig. 6 is a transverse sectional view taken on the `line C-'-C of Fig. 1 and ylooking in the direc-v tion indicated by the arrows.

drawings the lower end of the delivery pipe I0 is `securely fastened toa bottom plate or disc II,

respectively. The plate which is provided with lthree annular bosses I2,

I 43, and Il Each annular lboss, is Ainternally screw threaded to receive the externally screw threaded lower ends of the delivery pipe I0,the air cylinder I5 and the `xed pump cylinder I6 I,I vis also provided with a central boss I'Iy on its boss having an axial passage I8 the upper enfd sectional view taken onin the direc-` According to theA construction' shownin the underneath side, such i of which is shaped to form a seating for a ball valve I9 the v'lowerend'being internally screw threaded to'receive the screw threaded end of the suction pipe 20. A cage 2I of known construction is employed to maintain the b'all valve I9' in position. In order to establish internal communication between the xed pump cylinder I6 and the delivery pipe I the plate II is provided with two or more U shaped passages 22 of each of which terminates within the fixed pump cylinder I6 the other legs passing upwardly through and to the upper face of the boss1I4. The upper horizontal end of the boss I4 is faced to form a seating for an annular valve 23 the upward movement of which is limited by an annular collar 24 secured to the xed pump cylinder I6. This construction results in the liquid being forced through the U shaped passage at each `delivery stroke of the pump thuscausing the annular valve 23`to rise and permit the liquids to pass into the air cylinder I at the base thereof and from thence through longitudinal slots 25 (the use of which will be later described) in the air cylinder I5 into the annular space laetween the latter and the delivery pipe I0.

It has been previously stated that it is an objectY of this invention to provide an auxiliary piston 26 upon which the pressure of the head of water in the delivery pipe Ill is exerted in order to compensate for the weight of the pump rod 2l on each suction stroke of the pump. It will be seen however that as both the sleeve pistons 28 and 26 are located at or near the bottom of the delivery pipe Ill-it is essential to provide a means whereby the pressure of the head of water in the delivery pipe shall not be exerted upon the heads of these pistons on the up stroke of the pump. For this reason airv chambers 29 and 30 are provided and arranged so that the respective sleeve pistons 28 and 26 may freely move therein whilst atmospheric pressure e is. constantly maintained by means of vents 3| which are open to atmosphere through the respective pipes 32 and 33. Additional vents and air pipes may be provided if necessary.

rThe construction and arrangement of the fixed pump and the xed pump cylinder I6 and auxiliary cylinder 34 respectively are the same with the exception that the fixed auxiliary cylinder 34 is provided with apertures 35 to permit water' from the delivery pipe In to enter so that the pressure of the head of water may be exerted upon the interior of the auxiliary sleeve piston 26. Although the area of the slots 44 in the cylinder 36 may be sufficient to permit the water to pass freely to and from the delivery pipe through them and the apertures 35' into the iixed auxiliary cylinder 34 it ispreferred to provide the cylinder 36 with apertures 36h positioned in radial alignment with the apertures 35 in' the cylinder 34. The sleeve pistons 28 and 26 slide upon the respective fixed cylinders I6 and 34 and water tight joints are formed between the outer faces of the fixed cylinders I6 and 34 and the. inner faces of the sleeve pistons 28 .and 26 Vrespectively and between the outer faces of the latter and the inner faces of air cylinders l5 and 36 respectively by any suitable known means,

such as leather packing rings 31 of L shape in cross section which may be secured between screw threaded clamping rings 38 and 39.

The upper endof the air cylinder I5 is closed by a circular plate 4U surrounded by and integralv with a short cylindrical formation 4Iv which projects aboveand below the plate both ends being internally screw threaded, the lower portion to `'enable it to receive the screw threaded upper end ofthe air cylinder I5 and ytheupper portion to enable it to receive the lower end of the air cylinder 36. The upper face of the plate 40 is also provided with a centrally positioned annular boss 4formation 42 which is internally screw threaded to receive the screw threaded end of the xed auxiliary cylinder 34. The upper end of the air cylinder 36 is closed by a screw cap 36a. The length of both the cylinders I5 and 36 will be sufcient to enable the respective sleeve pistons to freely reciprocate therein.

It is necessary to connect the pistons 26 and 28 to one another and to connect both of them to the pump rod 2'! and for this purpose both the pistons are provided with two oppositely positioned radially projecting pins or trunnions 43 which project into the space between the air cylinders I5 and 36 and the delivery pipe I0, through the respective longitudinal slots 25 and 44 cut or formed in the respective air cylinders I5 and 36. The pins or trunnions engage in suitably positioned holes or eyes formed in the respective side members of an inverted U shaped yoke 45, such side members passing downwardly through the annular space between the air cylinders I5 and 36 and the inner face of the delivery pipe IU. The yoke 45 is also provided with a centrally positioned eye 45a by means of which it is shackled to the pump rod 21.

During the operation of the pump, air may collect in either of the sleeve pistons 26 and 28 and whilst it is essential to provide a means whereby such air may escape therefrom it is also necessary to ensure that air cannot be drawn from or water be forced into the air chambers 29 or 30.

for a ball or other suitable valve 48 and the lower one for a ball or other float valve 48 both of such valves being retained in position by means of a cage'56 of known construction. By referring to Fig. l or 2 it will be seen that the valve 48 will only be opened by air being forced upwardly through the aperture 4'I in the seating but it will be normally closed. The valve 49 however will be normally open and will close only when water rises in the sleeve piston to a height suiiicient to float it onto its seating in the plate 46 where it will remain until pressure within the piston is released at the beginning of the suction stroke.

In order to provide for access to the pistons at a point adjacent to the packing rings when removed frorn the delivery pipe the air cylinders I 5 and 36 may be made in two parts connected together by a socket or collar 5 I. It will of course be necessary to remove them from the delivery pipe Ill before this can be done.

To facilitate the removal of the delivery pipe I0 from the plate II the lower ends of the` pipes A internal communication between tain a suitable packing 55 whereby a water and air tight joint may be made at those points. The extended screw threaded smaller end of the reducing socket passes slidably through a hole in the plate l l and the projectingscrew threaded end thereof provided with a nut and washer 56. The length of the larger end of the socket is such that when the nut and washer 55-are removed the reducing socket may be slid upwardly on the pipe 32 (or 33) until its lower end lies freely within the annular space between the delivery pipe l and the air cylinder I5 when the delivery pipe may be unscrewed and raised vfrom the plate Il.

I claim:

`1. A pump for pumping water, oil or other liquids from wells and the like and comprising a pump cylinder concentrically within its associated delivery pipe and having its lower end fixed to and closed by a plate which forms a closure at the bottom of such delivery pipe, a sleeve piston coacting with the pump cylinder, an auxiliary cylinder in said delivery pipe above said pump cylinder, said auxiliary cylinder being closed at its lower end, and a coacting sleeve piston in said auxiliary cylinder, cylindrical housings enclosing the auxiliary and pump cylinders, means for connecting the sleeve pistons to one another and to a vertical driving rod, and means whereby the pressure of the head of water in the pipe is constantly exerted upon the interior of the auxiliary sleeve piston.

deli-very of the respective cylindrical housings and closures at the upper end of each cylindrical housing for forming air chambers in which the respective sleeve pistons may reciprocate.

5. A pump for pumping Water, oil or other liquids from wells and the like as claimed in claim l and comprising passages in the closure at the bottomv of the delivery pipe establishing internal communication, through slots in the cylindrical housing, "between the pump cylinder and the delivery pipe, and an annular valve adapted to close at the end of each delivery stroke of the pump.

' 6. A pump for pumping water, oil or other liq uids from wells and the like as claimed in claim 1 and comprisinga central boss on the underside of the plate that closes thelower endof the delivery 4pipe, a central hole in the plate `and boss, a valve seating and valve at the upper end of said hole, and means for connecting the boss to a. suction pipe.

'7. A pump for pumping water, oil or other liquids from wells and the like as claimed in claim 1 and comprising oppositely positioned radial studs near the bottom of the sleeve pistons, longitudinal slots in the lower portion of the cylindrical housings, and through which the studs project into an annularspace between the delivery pipe 2. A pump for `pumping water, oil or other liquids from wells and th'e like as claimed in claim 1 and comprising an air chamber in the upper end of each cylindrical housingand in which the respective sleeve pistons reciprocate, means for constantly maintaining atmospheric pressure withinA the air chambers and valves to permit air only to be ejected from the pump and auxiliary cylinders into the respective air chambers and said valves preventing the passage through them of water or air into said cylinders.

3. A pump for pumping water, oil or other liquids from wells and the like as claimed in claim l and comprising longitudinal slots in the lower portion of each cylindrical housing, a yoke connected to each of the sleeve pistons and to the vertical driving rod, and oppositely positioned apertures in the lower portion of the auxiliary cylinder and its cylindrical housing to establish and the auxiliary cylinder.

4. A pump for pumping water, oil or other liquids from wells and the like as claimed in claim l and comprising packing rings between the outer hole and passing downwardly through an an` the delivery pipe faces of the sleeve pistons and the internal faces and the cylindrical housings, and a yoke connected to the studs and to a vertical driving rod that passes upwardly through the delivery pipe.

8. A pump for pumping water, oil or other liq- -uids from wells and the like as claimed in claim l and comprising a central hole in the head of each sleeve piston, a disc screwed into each hole, a central vertical hole in the disc, each end of the hole terminating in a valve seating, a valve normally seated upon the upper valve seating, and a iioat valve normally supported adjacent to the valve seating on the underside of the disc by a cage secured to the disc.

9. A pump for pumping water, oil or other liquids from wells and the like as claimed in claim 1 and comprising a closure at the upper end of each cylindrical housing and packing means between theouter faces of the sleeve pistons and the inner faces of the respective cylindrical housings to form air chambers, holes in the walls of the cylindrical housings, a pipe connected to each nular space between the inner faces of the delivery pipe and the cylindrical housing therein, through a hole in the plate that closes the lower end of the delivery pipe and thence to atmosphere, and a water tight joint at the point where the pipepasses through the plate.

LEOPOLD [JULIUS LE FEVRE. 

